[JITLink] Fix a bad formatv format string.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358831 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ExecutionEngine/JITLink/JITLink_MachO_x86_64.cpp b/lib/ExecutionEngine/JITLink/JITLink_MachO_x86_64.cpp
index 6ee633b..857885b 100644
--- a/lib/ExecutionEngine/JITLink/JITLink_MachO_x86_64.cpp
+++ b/lib/ExecutionEngine/JITLink/JITLink_MachO_x86_64.cpp
@@ -91,7 +91,7 @@
         "Unsupported x86-64 relocation: kind=" + formatv("{0:x1}", RI.r_type) +
         ", pc_rel=" + (RI.r_pcrel ? "true" : "false") +
         ", extern= " + (RI.r_extern ? "true" : "false") +
-        ", length=" + formatv("{0:u}", RI.r_length));
+        ", length=" + formatv("{0:d}", RI.r_length));
   }
 
   Expected<Atom &> findAtomBySymbolIndex(const MachO::relocation_info &RI) {